(XML) Extensible Markup Language

Extensible Markup Language (XML) is a markup language that is used to store and transport data. It provides a flexible way of describing data by defining a set of rules for encoding documents in a format that is both human-readable and machine-readable.

XML was designed to be self-describing, meaning that the data being encoded includes both the content and a description of that content. This makes it easy for software applications to interpret the data and for humans to understand its structure.

XML is widely used for a variety of purposes, including data exchange between different software applications, data storage in databases, and the creation of new data formats. It is also used in web services, such as those provided by APIs, to exchange data between applications and services over the Internet.

Overall, XML has become a standard for data representation and exchange due to its simplicity, flexibility, and extensibility.

These resources should provide a good starting point for learning more about XML and how it can be used to store, transport, and exchange data.